STIHL MSA 160 C. Instruction Manual Manual de instrucciones

Transcripción

1 { STIHL Instruction Manual Manual de instrucciones To reduce the risk of kickback injury use STIHL reduced kickback bar and STIHL PM3 (1/4 Picco) chain depending on sprocket pitch or other available low kickback components. Advertencia! Para reducir el riesgo de lesionarse como resultado de un culatazo, utilice la barra de contragolpe reducido y la cadena PM3 (Picco de 1/4 pulg) de STIHL, dependiendo de la rueda dentada usada y de otros componentes reductores de contragolpe. Read and follow all safety precautions in Instruction Manual improper use can cause serious or fatal injury. Lea y siga todas las precauciones de seguridad dadas en el manual de instrucciones el uso incorrecto puede causar lesiones graves o mortales.

2 Instruction Manual 1-56 Manual de instrucciones

3 English Contents Original Instruction Manual Printed on chlorine-free paper Printing inks contain vegetable oils, paper can be recycled. ADREAS STIHL AG & Co. KG, A. M8.D11.FST _002_GB Guide to Using this Manual 2 Safety Precautions for Chain Saw Users 2 Safety Precautions and Working Techniques 4 Description of Operation 23 Cutting Attachment 23 Mounting the Bar and Chain (quick chain tensioner) 23 Tensioning the Saw Chain (quick chain tensioner) 25 Checking Chain Tension 25 Chain Lubricant 26 Filling Chain Oil Tank 26 Checking Chain Lubrication 28 Coasting Brake 28 Chain Brake 28 Connecting Charger to Power Supply 29 Charging the Battery 29 Light Emitting Diodes (LED) on Battery 30 Light Emitting Diodes (LED) on Charger 32 Switching On 33 Switching Off 34 Operating Instructions 34 Taking Care of the Guide Bar 35 Storing the Machine 36 Checking and Replacing the Chain Sprocket 36 Maintaining and Sharpening the Saw Chain 37 { Maintenance and Care 41 Main Parts 43 Specifications 45 Special Accessories 46 Ordering Spare Parts 47 Troubleshooting 48 Maintenance and Repairs 50 Battery Recycling 50 Disposal 50 Trademarks 51 Addresses 52 General Power Tool Safety Warnings 53 Allow only persons who fully understand this manual to operate your chain saw. To receive maximum performance and satisfaction from your STIHL chain saw, it is important that you read, understand and follow the safety precautions and the operating and maintenance instructions in chapter "Safety Precautions and Working Techniques" before using your chain saw. For further information you can go to Contact your STIHL dealer or the STIHL distributor for your area if you do not understand any of the instructions in this manual. Because a chain saw is a high-speed wood-cutting tool, some special safety precautions must be observed as with any other power saw to reduce the risk of personal injury. Careless or improper use may cause serious or even fatal injury. 1

4 English Guide to Using this Manual Pictograms The meanings of the pictograms attached to or embossed on the machine are explained in this manual. Depending on the model concerned, the following pictograms may be on your machine. Symbols in Text Chain oil tank; chain oil Direction of chain rotation Tension the chain Many operating and safety instructions are supported by illustrations. The individual steps or procedures described in the manual may be marked in different ways: A bullet marks a step or procedure. A description of a step or procedure that refers directly to an illustration may contain item numbers that appear in the illustration. Example: Loosen the screw (1). Lever (2)... In addition to the operating instructions, this manual may contain paragraphs that require your special attention. Such paragraphs are marked with the symbols and signal words described below: Danger! Indicates an imminent risk of severe or fatal injury. Indicates a hazardous situation which, if not avoided, could result in severe or fatal injury. Caution! Indicates a risk of property damage, including damage to the machine or its individual components. Engineering Improvements STIHL s philosophy is to continually improve all of its products. As a result, engineering changes and improvements are made from time to time. Therefore, some changes, modifications and improvements may not be covered in this manual. If the operating characteristics or the appearance of your machine differs from those described in this manual, please contact your STIHL dealer for assistance. Safety Precautions for Chain Saw Users When using cordless electric chain saws, basic safety precautions should always be followed to reduce the risk of fire, electric shock and personal injury, including the following: READ ALL ISTRUCTIOS 1. Keep Work Area Clean Cluttered areas invite injuries. Do not start cutting until you have a clear work area, secure footing and a planned retreat path from the falling tree. 2. Consider Work Area Environment Use extreme caution when cutting small size brush and saplings because the slender material may catch the saw chain and be whipped toward you or pull you off balance. Do not operate chain saw in a tree unless specifically trained to do so. When cutting a limb that is under tension be alert for spring back so that you will not be struck when the tension in the wood fibers is released. Don t expose chain saw to rain. Don t use chain saw in damp or wet locations. Do not use chain saw in presence of flammable liquids or gases. 3. Guard Against Electric Shock Prevent body contact with grounded surfaces. For example: metal pipes, wire fences. 2

5 4. Keep Children Away Do not let bystanders contact chain saw. All bystanders should be kept away from work area. 5. Store Idle Chain Saw Indoors When not in use, chain saws should be stored indoors in a dry, and high or locked-up place with battery removed and chain brake engaged (front hand guard on ƒ out of reach of children). When storing saw, use a scabbard or carrying case. 6. Don t Force Chain Saw It will do the job better and safer at the rate for which it was designed. 7. Use Right Tool Cut wood only. Don t use chain saw for purpose not intended for example don t use chain saw for cutting plastic, masonry, non-wood building materials. 8. Dress Properly Do not wear loose clothing or jewelry. They can be caught in moving parts. Use of heavy-duty, nonslip gloves and substantial footwear is recommended when working outdoors. Wear protective hair covering to contain long hair. 9. Use Safety Glasses Also use safety footwear; snug fitting clothing; protective gloves; hearing and head protection. 10. Carrying Saw Carry the chain saw by the front handle with the saw stopped, finger off the trigger switch, the guide bar and saw chain to the rear. Do not carry chain saw with battery plugged in. 11. Maintain Chain Saw With Care Inspect chain saw periodically and if damaged, have repaired by authorized service facility. Keep chain sharp and chain saw clean for better and safer performance. Follow instructions for lubricating and changing accessories. Keep handles dry, clean, and free from oil and grease. 12. Switch Off Chain Saw Remove battery and move front hand guard to ƒ when chain saw is not in use, before servicing and when changing accessories and attachments, such as saw chain or guard. 13. Stay Alert Watch what you are doing. Use common sense. Do not operate chain saw when you are tired. Keep all parts of the body away from the saw chain when the motor is operating. Before you start the saw, make sure the saw chain is not contacting anything. 14. Check Damaged Parts Before further use of the chain saw, a guard or other part that is damaged or not functioning properly should be carefully checked to determine that it will operate properly and perform its intended function. Check for alignment of moving parts, binding of moving English parts, breakage of parts, mounting, and any other condition that may affect its operation. A guard or other part that is damaged should be properly repaired or replaced by your STIHL servicing dealer unless indicated elsewhere in this manual. Have damaged or non functioning switches replaced by your STIHL servicing dealer. Do not use chain saw if switch does not turn it on and off. Do not operate a chain saw that is damaged, improperly adjusted, or is not completely and securely assembled. Be sure that the saw chain stops moving when the trigger switch is released. 15. Replacement Parts When servicing, use only identical STIHL replacement parts Kickback may occur when the nose or tip of the guide bar touches an object, or when the wood closes in and pinches the saw chain in the cut. Tip contact in some cases may cause a lightning fast reverse reaction, kicking the guide bar up and back towards the operator. Pinching the saw chain along the top of the guide bar may push the guide bar rapidly back towards the operator. Either of these reactions may cause you to lose control of the saw which could result in serious personal injury. The following precautions should be followed to minimize kickback: 3

6 English 1. Grip Saw Firmly Hold the chain saw firmly with both hands when the motor is running. Use a firm grip with thumbs and fingers encircling the chain saw handles. 2. Do not overreach. 3. Keep proper footing and balance at all times. 4. Don t let the nose of the guide bar contact a log, branch, ground or other obstruction. 5. Do not cut above shoulder height. 6. Use devices such as low kickback chain, guide bar tip guards, chain brakes and special guide bars that reduce the risks associated with kickback. 7. Only use replacement bars and chains specified by the naufacturer or the equivalent. SAVE THESE ISTRUCTIOS Safety Precautions and Working Techniques Because a chain saw is a high-speed, fast-cutting power tool, special safety precautions must be observed to reduce the risk of personal injury. It is important that you read, fully understand and observe the preceding and following safety precautions and warnings. Read the instruction manual and the safety instructions periodically. Careless or improper use may cause serious or fatal injury. Reactive forces, including kickback, can be dangerous. Pay special attention to the section on reactive forces. Have your STIHL dealer show you how to operate your power tool. All safety precautions that are generally observed when working with an axe or a hand saw also apply to the operation of chain saws. Observe all applicable federal, state and local safety regulations, standards and ordinances. The use of noise emitting power tools may be restricted to certain times by national, state or local regulations. Do not lend or rent your power tool without the instruction manual. Be sure that anyone using it understands the information contained in this manual. The use of this machine may be hazardous.the saw chain has many sharp cutters. If the cutters contact your flesh, they will cut you, even if the chain is not moving. Use your chain saw only for cutting wooden objects. Do not use it for other purposes, since misuse may result in personal injury or property damage, including damage to the machine. Minors should never be allowed to use this power tool. Bystanders, especially children, and animals should not be allowed in the area where it is in use. To reduce the risk of injury to bystanders and damage to property, never let your power tool run unattended. When it is not in use (e.g. during a work break), shut it off and make sure that unauthorized persons do not use it. To do this, move the front hand guard to ƒ and remove the battery from the power tool. 4

7 Most of these safety precautions and warnings apply to the use of all STIHL chain saws. Different models may have different parts and controls. See the appropriate section of your instruction manual for a description of the controls and the function of the parts of your model. Always switch off the motor, move front hand guard to ƒ and remove the battery before transporting, storing or carrying out any work on the power tool. This avoids the risk of the motor starting unintentionally. STIHL recommends the use of original STIHL replacement parts. They are specifically designed to match your model and meet your performance requirements. Safe use of a chain saw involves 1 the operator 2 the power tool 3 the use of the power tool. THE OPERATOR Physical Condition You must be in good physical condition and mental health and not under the influence of any substance (drugs, alcohol, etc.) which might impair vision, dexterity or judgment. Do not operate this machine when you are fatigued. Be alert if you get tired, take a break. Tiredness may result in loss of control. Working with any power tool can be strenuous. If you have any condition that might be aggravated by strenuous work, check with your doctor before operating this machine. Prolonged use of a power tool (or other machines) exposing the operator to vibrations may produce whitefinger disease (Raynaud's phenomenon) or carpal tunnel syndrome. These conditions reduce the hand's ability to feel and regulate temperature, produce numbness and burning sensations and may cause nerve and circulation damage and tissue necrosis. All factors which contribute to whitefinger disease are not known, but cold weather, smoking and diseases or physical conditions that affect blood vessels and blood transport, as well as high vibration levels and long periods of exposure to vibration are mentioned as factors in the development of whitefinger disease. In order to reduce the risk of whitefinger disease and carpal tunnel syndrome, please note the following: English Wear gloves and keep your hands warm. Keep the saw chain sharp and the saw well maintained. A dull chain will increase cutting time, and pressing a dull chain through wood will increase the vibrations transmitted to your hands. A power tool with loose components will tend to have higher vibration levels. Maintain a firm grip at all times, but do not squeeze the handles with constant, excessive pressure. Take frequent breaks. All the above-mentioned precautions do not guarantee that you will not sustain whitefinger disease or carpal tunnel syndrome. Therefore, continual and regular users should closely monitor the condition of their hands and fingers. If any of the above symptoms appear, seek medical advice immediately. According to STIHL s current knowledge, the electric motor of this unit should not interfere with a pacemaker. When in doubt, however, persons with a pacemaker should consult their physician and the pacemaker manufacturer before operating this tool. Proper Clothing To reduce the risk of injury, the operator should wear proper protective apparel. 5

8 English Clothing must be sturdy and snug-fitting, but allow complete freedom of movement. Wear long pants made of heavy material to help protect your legs from contact with branches or brush. To reduce the risk of cut injuries, wear pants or chaps that contain pads of cut retardant material. Avoid loose-fitting jackets, scarfs, neckties, jewelry, flared or cuffed pants, unconfined long hair or anything that could become caught on branches, brush or the moving parts of the unit. Secure hair so it is above shoulder level. Good footing is very important. Wear sturdy boots with nonslip soles. Steel-toed safety boots are recommended. ever wear sandals, flip-flops or go barefoot. To reduce the risk of injury to your eyes never operate your power tool unless wearing goggles or properly fitted protective glasses with adequate top and side protection complying with ASI Z87.1 (or your applicable national standard). To reduce the risk of injury to your face STIHL recommends that you also wear a face shield or face screen over your goggles or protective glasses. Wear an approved safety hard hat to reduce the risk of injury to your head when there is a danger of head injuries. Chain saw noise may damage your hearing. Wear sound barriers (ear plugs or ear mufflers) to protect your hearing. Continual and regular users should have their hearing checked regularly. Be particularly alert and cautious when wearing hearing protection because your ability to hear warnings (shouts, alarms, etc.) is restricted. THE POWER TOOL Always wear gloves when handling the machine and the cutting tool. Heavy-duty, nonslip gloves improve your grip and help to protect your hands. For illustrations and definitions of the power tool parts see the chapter on "Main Parts." ever modify this power tool in any way. Only attachments supplied by STIHL or expressly approved by STIHL for use with the specific STIHL model are authorized. Although certain unauthorized attachments are useable with STIHL power tools, their use may, in fact, be extremely dangerous. If your power tool is subjected to unusually high loads for which it was not designed (e.g. heavy impact or a fall), always check that it is in good condition before continuing work see also "Before Starting Work." Make sure the safety devices are working properly. Do not continue operating your power tool if it is damaged. In case of doubt, have the machine checked by your STIHL servicing dealer. Battery Risk of fire, explosion and/or burns, including chemical burns. Do not disassemble, crush, heat above 212 F (100 C), expose to fire or incinerate. ever expose the battery to microwaves or high pressures. Do not place the battery on or near fires, stoves or in other high-temperature locations. Do not place the battery in direct sunlight or store it inside a vehicle in hot weather. Doing so may cause the battery to generate heat, rupture or 6

9 ignite. Using the batteries in this manner may also result in a loss of performance and a shortened life expectancy. In case of fire: Stay clear of any vapors or gases generated, taking wind direction into account. If possible without danger, remove battery from the vicinity of the fire. In principle, cooling the battery or extinguishing the fire with water is possible. It is preferable to extinguish the fire with a multipurpose dry chemical fire extinguisher. As for any fire, evacuate the area and fight the fire from a safe distance. Once the fire has been extinguished, the area should be monitored (fire watch) in case of a flareup, until the battery has cooled sufficiently. Restrict access to the area until completion of clean-up. Do not touch the burnt battery or any spilled liquids. Use inert absorbent to absorb spilled liquids. Use and store the battery only within a temperature range from 14 F (-10 C) and no more than 122 F (+ 50 C). Protect the battery from direct sunlight. Use STIHL batteries only with STIHL power tools and charge them only with STIHL chargers. Replace battery with STIHL AP battery only. Use only original STIHL rechargeable batteries. Charge the battery before use. Protect from rain do not immerse in fluids. Do not open, drop, hit or damage battery. ever insert objects into the battery's cooling slots, since they may damage the battery. The battery contains safety features and devices which, if damaged, may cause the battery to generate heat, rupture or ignite. ever use or charge a defective, damaged, cracked or deformed battery. Immediately discontinue use of the battery if, while using, charging or storing, it emits an unusual smell, feels hot or appears abnormal in any other way. Fluid may leak from the battery if it is damaged or is not used properly avoid contact with the skin! Leaking battery fluid can cause skin irritation and chemical burns. In the event of accidental contact, immediately rinse thoroughly with mild soap and water. If fluid gets into your eye(s), do not rub your eye(s) but rinse water over the open eye(s) for 15 minutes at least. Also seek medical attention immediately. English ever bridge (short circuit) the battery terminals with metallic objects, since this may damage the battery and possibly cause a fire. Keep a battery that is not in use away from metal objects (e.g. nails, coins, jewelry). Do not use metal containers for transporting batteries. Store the battery out of reach of children in a cool and dry area away from direct sunlight and excess heat or cold (14 F 122 F (-10 C +50 C)). Charger Use only original STIHL chargers. Use only for charging geometrically matching STIHL type AP batteries with a maximum capacity of 10 Ah and a maximum voltage of 42 V. ever charge defective, leaking or deformed batteries. Connect the charger only to a power supply with the voltage and frequency specified on the rating plate. Always connect the charger to a properly installed wall outlet. ever use a charger with damaged housing, damaged power supply cord or damaged plug. Do not operate the charger if it has received a sharp blow, been dropped or otherwise damaged in any way. Do not open or dissassemble charger no user serviceable parts inside. Store charger out of the reach of children. 7

10 English Protect the charger from rain and dampness. Keep charger dry. Use and store charger only indoors in dry rooms. Operate charger at temperatures between 41 F (5 C) and 104 F (40 C). Allow the charger to cool down normally do not cover it. ever bridge the contacts of the charger with metallic objects (e.g. nails, coins, jewelry) short circuit. The charger may be damaged by a short circuit. In the event of smoke or fire in the charger, disconnect it from outlet immediately. To reduce the risk of electric shock or short circuit, do not insert any objects into the charger's cooling slots. The charger heats up during the charging process. Do not operate on an easily combustible surface (e.g. paper, texiles) or in an easily combustible environment risk of fire. Do not operate in a hazardous location, i.e. in a location where there are combustible liquids (fumes), vapors or dusts. Chargers can produce sparks, which may ignite the dust or vapors risk of explosion. Check the charger's power supply cord and plug regularly for damage. If the power supply cord or plug is damaged, immediately disconnect the plug from the wall outlet to avoid the risk of electric shock. ever jerk the power supply cord to disconnect it from the wall outlet. To unplug, grasp the plug, not the cord. Have a damaged power supply cord repaired by an experienced electrician. Do not use the power supply cord for any other purpose, e.g. for carrying or hanging up the charger. ever use power supply cords that do not comply with regulations. Make sure the power supply cord is located and/or marked so that it will not be stepped on, tripped over, come in contact with sharp edges or moving parts or otherwise be subjected to damage or stress. An extension cord should not be used unless absolutely necessary. If an extension cord must be used, plug the charger into a properly wired 16 gauge (AWG 16) or heavier gauge extension cord with blades that are the same number, size and shapes as the blades on the charger. To reduce the risk of electric shock: Always connect the unit to a properly installed wall outlet. Make sure the insulation of the power supply cord and plug is in good condition. Unplug the power supply cord from the outlet when charger is not in use. ever store the battery in the charger. THE USE OF THE POWER TOOL Transporting the Power Tool To reduce the risk of injury from saw chain contact, never carry or transport your power tool with the saw chain moving. Always fully release the trigger switch and make sure the chain has stopped moving before putting the saw down or carrying it. Always engage the chain brake when taking more than a few steps. Always switch off the motor, and fit the chain guard (scabbard) over the chain and guide bar, move front hand guard to ƒ and remove the battery - even when you carry the unit for short distances. When transporting it in a vehicle, properly secure it to prevent turnover, chain oil spillage and damage. 8

11 English Remove the battery from the power tool. This avoids the risk of the motor starting unintentionally. It may be carried only in a horizontal position. Grip the front handle in a manner that the machine is balanced horizontally. Keep the cutting attachment behind you. Before Starting Work Take off the chain guard (scabbard) and inspect the saw for proper condition and operation. (See the maintenance chart near the end of the instruction manual.) Always check your power tool for proper condition and operation before starting, particularly the trigger switch, trigger switch lockout, front hand guard and cutting tool. The trigger switch and the trigger switch lockout must move freely and always spring back to the idle position. Ensure that the trigger switch will not engage when the trigger switch lockout is not pressed. ever attempt to modify the controls or safety devices. 3999BA024 K ever operate your power tool if it is damaged, improperly adjusted or maintained, or not completely or securely assembled. For proper assembly of the bar and chain follow the procedure described in the chapter "Mounting the Bar and Chain" of your instruction manual. STIHL Oilomatic chain, guide bar and sprocket must match each other in gauge and pitch. Before replacing any bar and chain, see the chapter entitled "Specifications" in the instruction manual and the section "Kickback" and the "ASI B chain saw kickback standard" below. Proper tension of the chain is extremely important. In order to avoid improper setting, the tensioning procedure must be followed as described in your manual. Always make sure the hexagonal nut(s) for the sprocket cover is (are) tightened securely after tensioning the chain in order to secure the bar. ever start the saw with the sprocket cover loose. Check chain tension once more after having tightened the nut(s) and thereafter at regular intervals (whenever the saw is shut off). If the chain becomes loose while cutting, switch off the motor, remove the battery and then tighten. ever try to adjust the chain while the motor is running! After adjusting a chain, start the saw, let the motor run for a while, then switch motor off and recheck chain tension. Proper chain tension is very important at all times. Keep the handles clean and dry at all times; it is particularly important to keep them free of moisture, pitch, oil, grease or resin in order for you to maintain a firm grip and properly control your power tool. Check contacts in battery compartment for foreign matter. Keep clean. Fit the battery correctly it must engage audibly. For specific starting instructions, see the appropriate section of your instruction manual. During Operation Holding and Controlling the Power Tool Always hold the unit firmly with both hands on the handles while you are working. Wrap your fingers and thumbs around the handles. Your right hand should grip the rear handle. This also applies to left-handers. With your hands in this position, you can 3999BA000 K 9

12 English best oppose and absorb the push, pull and kickback forces of your saw without losing control (see section on reactive forces). To reduce the risk of serious or fatal injury to the operator or bystanders from loss of control, never use the saw with one hand. It is more difficult for you to control reactive forces and to prevent the bar and chain from skating or bouncing along the limb or log. To reduce the risk of cut injuries, keep hands and feet away from the saw chain. ever touch a moving saw chain with your hand or any other part of your body. Keep proper footing and balance at all times. Special care must be taken in slippery conditions (wet ground, snow) and in difficult, overgrown terrain. Watch for hidden obstacles such as tree stumps, roots, rocks, holes and ditches to avoid stumbling. There is increased danger of slipping on freshly debarked logs. For better footing, clear away fallen branches, scrub and cuttings. Be extremely cautious when working on slopes or uneven ground. To reduce the risk of injury from loss of control, never work on a ladder or any other insecure support. ever hold the machine above shoulder height. Do not overreach. ever work in a tree unless you have received specific, professional training for such work, are properly secured (such as tackle and harness system or a lift bucket), have both hands free for operating the chain saw in a cramped environment and have taken proper precautions to avoid injury from falling limbs or branches. 001BA031 K Position the chain saw in such a way that your body is clear of the cutting attachment whenever the motor is running. Stand to the left of cut while bucking. ever put pressure on the saw when reaching the end of a cut. The pressure may cause the bar and rotating chain to pop out of the cut or kerf, go out of control and strike the operator or some other object. If the rotating chain strikes some other object, a reactive force may cause the moving chain to strike the operator. Working Conditions Operate your power tool only under good visibility and daylight conditions only. Work carefully. Your chain saw is a one-person machine. Do not allow other persons in the general work area, even when starting. Stop the motor immediately if you are approached. Even though bystanders should be kept away from the running saw, never work alone. Keep within calling distance of others in case help is needed. 001BA082 K 10

13 English Be sure that the guide bar and chain are clear of you and all other obstructions and objects, including the ground. If the upper quadrant of the tip of the bar touches any object, it may cause kickback to occur (see section on reactive forces). ever attempt to start the chain saw when the guide bar is in a cut or kerf. Use of this product (including sharpening the saw chain) can generate dust, mist and fumes containing chemicals that are known to cause respiratory problems, cancer, birth defects, or other reproductive harm. If you are unfamiliar with the risks associated with the particular dust, mist or fume at issue, consult your employer, governmental agencies such as OSHA and IOSH and other sources on hazardous materials. California and some other authorities, for instance, have published lists of substances known to cause cancer, reproductive toxicity, etc. Inhalation of certain dusts, especially organic dusts such as mold or pollen, can cause susceptible persons to have an allergic or asthmatic reaction. Substantial or repeated inhalation of dust and other airborne contaminants, in particular those with a smaller particle size, may cause respiratory or other illnesses. This includes wood dust, especially from hardwoods, but also from some softwoods such as Western Red Cedar. Control dust (such as saw dust), mists (such as oil mist from chain lubrication) and fumes at the source where possible. Use good work practices, such as always cutting with a properly sharpened chain (which produces wood chips rather than fine dust) and operating the unit so that the wind or operating process directs any dust raised by the power tool away from the operator. Follow the recommendations of EPA / OSHA / IOSH and occupational and trade associations with respect to dust ("particulate matter"). When the inhalation of dust cannot be substantially controlled, i.e., kept at or near the ambient (background) level, the operator and any bystanders should wear a respirator approved by IOSH / MSHA for the type of dust encountered. Breathing asbestos dust is dangerous and can cause severe or fatal injury, respiratory illness or cancer. The use and disposal of asbestos-containing products have been strictly regulated by OSHA and the Environmental Protection Agency. If you have any reason to believe that you might be cutting asbestos, immediately contact your employer or a local OSHA representative. Operating Instructions In the event of an emergency, switch off the motor immediately, move the front hand guard to ƒ and remove the battery. The saw chain continues to move for a short period after the trigger switch is fully released. Your chain saw is equipped with a chain catcher. It is designed to reduce the risk of personal injury in the event of a thrown or broken chain. From time to time, the catcher may be damaged or removed. To reduce the risk of personal injury, do not operate a chain saw with a damaged or missing chain catcher. Your saw is not designed for prying or shoveling away limbs, roots or other objects. Such use could damage the cutting attachment. 11

14 English When sawing, make sure that the saw chain does not touch any foreign materials such as rocks, fences, nails and the like. Such objects may be flung off, damage the saw chain or cause the saw to kickback. Check the cutting attachment at regular short intervals during operation, or immediately if there is a noticeable change in cutting behavior: Switch off the motor. Move front hand guard to ƒ. Remove the battery. Check condition and tightness, look for cracks. The drive motor is not waterproof. ever work with the power tool in the rain or in wet or very damp locations. Do not leave the machine outdoors in the rain. Danger! Do not rely on the tool s insulation against electric shock. To reduce the risk of electrocution, never operate this power tool in the vicinity of any wires or cables (power, etc.) which may be carrying electric current. Reactive Forces Including Kickback Reactive forces may occur any time the chain is rotating. Reactive forces can cause serious personal injury. 001BA093 LÄ The powerful force used to cut wood can be reversed and work against the operator. If the rotating chain is suddenly stopped by contact with any solid object such as a log or branch or is pinched, the reactive forces may occur instantly. These reactive forces may result in loss of control, which, in turn, may cause serious or fatal injury. An understanding of the causes of these reactive forces may help you avoid the element of surprise and loss of control. Sudden surprise contributes to accidents. The most common reactive forces are: kickback, pushback, pull-in. Kickback Kickback may occur when the moving saw chain near the upper quadrant of the bar nose contacts a solid object or is pinched. The reaction of the cutting force of the chain causes a rotational force on the chain saw in the direction opposite to the chain movement. This may fling the bar up and back in a lightning fast reaction in an uncontrolled arc mainly in the plane of the bar. Under some cutting circumstances the bar moves toward the operator, who may suffer severe or fatal injury. Kickback may occur, for example, when the chain near the upper quadrant of the bar nose contacts the wood or is pinched during limbing or when it is incorrectly used to begin a plunge or boring cut. The greater the force of the kickback reaction, the more difficult it becomes for the operator to control the saw. Many factors influence the occurrence and force of the kickback reaction. These include chain speed, the speed at which 001BA035 K 12

15 the bar and chain contact the object, the angle of contact, the condition of the chain and other factors. The type of bar and saw chain you use is an important factor in the occurrence and force of the kickback reaction. Some STIHL bar and chain types are designed to reduce kickback forces. STIHL recommends the use of reduced kickback bars and low kickback chains. ASI B Chain Saw Kickback Standard 5.11 of ASI standard B , sets certain performance and design criteria related to chain saw kickback, which has been adopted for electric chain saws in UL 1662 in 30. To comply with kickback 30 of UL 1662, electric chain saws must, in their original condition, meet a 45 computer derived kickback angle when equipped with certain cutting attachments, and must be equipped with at least two devices to reduce the risk of kickback injury, such as a chain brake, low kickback chain, reduced kickback bar, etc. The computer derived angles for electric saws are measured by applying a computer program to test results from the kickback test machine. The computer derived angles of 5.11 of ASI B may bear no relationship to actual kickback bar rotation angles that may occur in real life cutting situations. In addition, features designed to reduce kickback injuries may lose some of their effectiveness when they are no longer in their original condition, especially if they have been improperly maintained. Compliance with 5.11 of ASI B does not automatically mean that in a real life kickback the bar and chain will rotate at most 45. In order for powerheads to comply with the computed kickback angle requirements of 30 of UL 1662 / 5.11 of ASI B use only the following cutting attachments: bar and chain combinations listed as complying in the "Specifications" section of the instruction manual or other replacement bar and chain combinations marked in accordance with the standard for use on the powerhead or replacement chain designated "low kickback saw chain.'' See the section on "Low kickback saw chain and reduced kickback bars." Devices for Reducing the Risk of Kickback Injury STIHL recommends the use of the STIHL Quickstop chain brake on your powerhead with green labeled reduced kickback bars and low kickback chains. English To reduce the risk of injury, never use a saw if the chain brake does not function properly. Take the saw to your local STIHL servicing dealer. Do not use the saw until the problem has been rectified. STIHL Quickstop Chain Brake STIHL has developed a chain stopping system designed to reduce the risk of injury in certain kickback situations. It is called a Quickstop chain brake. When a kickback occurs, the guide bar may rotate around the front handle. If the cutting position is such that the operator s left hand is gripping the front handle behind the hand guard, and if the left hand rotates around the front handle and makes a sufficiently forceful contact with the front hand guard, which is the Quickstop activating lever, this contact will activate a properly maintained Quickstop chain brake. 001BA174 K 13

16 English All STIHL chain saws are now equipped with a Quickstop chain brake that can be activated by inertia. If the forces of an occurring kickback are sufficiently high, the hand guard is accelerated toward the bar nose even without hand contact. See the chapter entitled "Chain Brake" of your instruction manual. ever operate your chain saw without a front hand guard. In a kickback situation this guard helps protect your left hand and other parts of your body. In addition, removal of the hand guard on a saw equipped with a Quickstop chain brake will deactivate the chain brake. o Quickstop or other chain brake device prevents kickback. These devices are designed to reduce the risk of kickback injury, if activated, in certain kickback situations. In order for the Quickstop to reduce the risk of kickback injury, it must be properly maintained and in good working order. See the chapter of your instruction manual entitled "Chain Brake" and the section "Maintenance, Repair and Storing" at the end of these Safety Precautions. In addition, there must be enough distance between the bar and the operator to ensure that the Quickstop has sufficient time to activate and stop the chain before potential contact with the operator. An improperly maintained chain brake may increase the time needed to stop the chain after activation, or may not activate at all. Low Kickback Saw Chain and Reduced Kickback Bars STIHL offers a variety of bars and chains. STIHL reduced kickback bars and low kickback chains are designed to reduce the risk of kickback injury. Other chains are designed to obtain higher cutting efficiency or sharpening ease but may result in higher kickback tendency. STIHL has developed a color code system to help you identify the STIHL reduced kickback bars and low kickback chains. Cutting attachments with green warning decals or green labels on the packaging are designed to reduce the risk of kickback injury. The matching of green decaled powerheads with green labeled bars and green labeled chains gives compliance with the computed kickback angle requirements of 30 of UL 1662 / ASI B when the products are in their original condition. Products with yellow decals or labels are for users with extraordinary cutting needs and experience and specialized training for dealing with kickback. STIHL recommends the use of its green labeled reduced kickback bars, green labeled low kickback chains and a STIHL Quickstop chain brake for both experienced and inexperienced chain saw users. Please ask your STIHL dealer to properly match your powerhead with the appropriate bar/chain combination to reduce the risk of kickback injury. Green labeled bars and chains are recommended for all powerheads. See your "STIHL Bar and Chain Information" leaflet for details. Use of other, non-listed bar/chain combinations may increase kickback forces and increase the risk of kickback injury. ew bar/chain combinations may be developed after publication of this literature, which will, in combination with certain electric chain saws, comply with 30 of UL 1662 / 5.11 of ASI B Check with your STIHL dealer for such combinations. Reduced kickback bars and low kickback chains do not prevent kickback, but they are designed to reduce the risk of kickback injury. They are available from your STIHL dealer. Even if your saw is equipped with a Quickstop, a reduced kickback bar and/or low kickback chain, this does not eliminate the risk of injury by kickback. Therefore, always observe all safety precautions to avoid kickback situations. Low Kickback Chain Some types of saw chains have specially designed components to reduce the force of nose contact kickback. STIHL has developed low kickback chains for your powerhead. 14

17 "Low kickback saw chain" is a chain which has met the kickback performance requirements of of ASI B (Gasoline- Powered Chain Saws Safety Requirements) when tested in its original condition on a selected representative sample of chain saws below 3.8 cubic inches (62 cm³) displacement specified in ASI B There are potential powerhead and bar combinations with which low kickback saw chains can be used which have not been specifically certified to comply with the 45 computer derived kickback angle of 5.11 of ASI B Some low kickback chains have not been tested with all powerhead and bar combinations. A dull or improperly sharpened chain may reduce or negate the effects of the design features intended to reduce kickback energy. Improper lowering or sharpening of the depth gauges or shaping of the cutters may increase the chance and the potential energy of a kickback. Always cut with a properly sharpened chain. Reduced Kickback Bars STIHL green labeled reduced kickback bars are designed to reduce the risk of kickback injury when used with STIHL green labeled low kickback chains. When used with other, more aggressive chains, these bars may be less effective in reducing kickback. For a properly balanced saw and in order to comply with of ASI B , use only bar lengths listed in the specifications chapter of the instruction manual for your chain saw powerhead. Bow Guides Do not mount a bow guide on any STIHL chain saw. Any chain saw equipped with a bow guide is potentially very dangerous. The risk of kickback is increased with a bow guide because of the increased kickback contact area. Low kickback chains will not significantly reduce the risk of kickback injury when used on a bow guide. To Avoid Kickback The best protection from personal injury that may result from kickback is to avoid kickback situations: 1. Hold the chain saw firmly with both hands and maintain a secure grip. Don t let go. 2. Be aware of the location of the guide bar nose at all times. English 3. ever let the nose of the guide bar contact any object. Do not cut limbs with the nose of the guide bar. Be especially careful near wire fences and when cutting small, tough limbs, small size brush and saplings which may easily catch the chain. 4. Do not overreach. 5. Do not cut above shoulder height. 6. Begin cutting and continue at full speed. 7. Cut only one log at a time. 8. Use extreme caution when reentering a previous cut. 9. Do not attempt to plunge cut if you are not experienced with these cutting techniques. 10. Be alert for shifting of the log or other forces that may cause the cut to close and pinch the chain. 11. Maintain saw chain properly. Cut with a correctly sharpened, properly tensioned chain at all times. 12. Stand to the side of the cutting path of the chain saw. A = Pull-in A Pull-in occurs when the chain on the bottom of the bar is suddenly stopped when it is pinched, caught or encounters 001BA037 K 15

18 English a foreign object in the wood. The reaction of the chain pulls the saw forward and may cause the operator to lose control. Pull-in frequently occurs when the bumper spike of the saw is not held securely against the tree or limb and when the chain is not rotating at full speed before it contacts the wood. Use extreme caution when cutting small size brush and saplings which may easily catch the chain, be whipped toward you or pull you off balance. To Avoid Pull-in 1. Always start a cut with the chain rotating at full speed and the bumper spike in contact with the wood. 2. The risk of pull-in may also be reduced by using wedges to open the kerf or cut. B = Pushback B Pushback occurs when the chain on the top of the bar is suddenly stopped when it is pinched, caught or encounters a foreign object in the wood. The reaction of the chain may drive the saw rapidly straight back toward the operator and 001BA038 K may cause loss of saw control. Pushback frequently occurs when the top of the bar is used for cutting. To Avoid Pushback 1. Be alert to forces or situations that may cause material to pinch the top of the chain. 2. Do not cut more than one log at a time. 3. Do not twist the saw when withdrawing the bar from a plunge cut or underbuck cut because the chain can pinch. Cutting Techniques These general instructions apply to all chain saws. As stated above, however, STIHL recommends against the use of your cordless electric chain saw for cutting trees, logs or branches having a diameter of more than 8 inches. For cutting larger trees, logs or branches, a more powerful, faster and/or steady cut may be necessary to reduce the risk of binding, stalling or a change in conditions during a longer cutting time that could lead to a loss of control of the object being cut and serious personal injury. Felling Felling is cutting down a tree. The cordless chain saw is of only limited suitability for felling and limbing. If, however, a tree is to be felled and limbed with a cordless chain saw, it is imperative to observe the following instructions. Before felling a tree, consider carefully all conditions which may affect the direction of fall. There are a number of factors that may affect and change the intended direction of fall, e.g. wind direction and speed, lean of tree, surrounding trees and obstacles, sloping ground, one-sided limb structure, wood structure, decay, snow load, etc. To reduce the risk of severe or fatal injury to yourself or others, look for these conditions prior to beginning the cut, and be alert for a change in direction while the tree is falling. Always observe the general condition of the tree. Inexperienced users should never attempt to cut trees that are decayed or rotted inside or that are leaning or otherwise under tension. There is an increased risk that such trees could snap or split while being cut and cause serious or fatal injury to the operator or bystanders. Also look for broken or dead branches which could vibrate loose and fall on the operator. When felling on a slope, the operator should stand on the uphill side if possible. 16

19 English Felling Instructions Escape Path Buttress Roots B 1 1/ / 2 001BA088 LÄ When felling, maintain a distance of at least 2 1/2 tree lengths from the nearest person. When felling in the vicinity of roads, railways and power lines, etc., take extra precautions. Inform the police, utility company or railway authority before beginning to cut. A B BA040 K If the tree has large buttress roots, cut into the largest buttress vertically first (horizontally next) and remove the resulting piece. Conventional Cut 001BA146 K The noise of your chain saw may drown any warning call. First clear the tree base and work area from interfering limbs and brush and clean its lower portion with an ax. Then, establish two paths of escape (B) and remove all obstacles. These paths should be generally opposite to the planned direction of the fall of the tree (A) and about at a 45 angle. Place all tools and equipment a safe distance away from the tree, but not on the escape paths. C C 001BA143 K Felling notch (C) determines the direction of the fall For a conventional cut: 17

20 English Properly place felling notch perpendicular to the line of fall, close to the ground. Cut down at approx. 45 angle to a depth of about 1/5 to 1/4 of the trunk diameter. Make second cut horizontal. Make second cut from below at approx. 40 degree angle. Remove resulting 90 piece. Making Sapwood Cuts D =Felling Cut D Remove resulting 45 piece. Open-face Technique D 001BA144 K Felling notch (C) determines the direction of the fall For an open-face cut: Properly place felling notch perpendicular to the line of fall, close to the ground. Cut down at approx. 50 angle to a depth of approx.1/5 to 1/4 of the trunk diameter. For medium sized or larger trees make cuts at both sides of the trunk, at same height as subsequent felling cut. Cut to no more than width of guide bar. This is especially important in softwood in summer it helps prevent sapwood splintering when the tree falls. 001BA150 K Conventional and open-face technique: Begin 1 to 2 inches (2,5 to 5 cm) higher than center of felling notch. Cut horizontally toward the felling notch. Leave approx.1/10 of diameter uncut. This is the hinge. Do not cut through the hinge you could lose control of the direction of the fall. Drive wedges into the felling cut where necessary to control the fall. If the tip of the bar contacts a wedge, it may cause kickback. Wedges should be of wood or plastic never steel, which can damage the chain. 18